Speaking from my own religious tradition in this Christmas season, 2,000 years ago a homeless woman gave birth to a homeless child in a manger because the inn was full.

I feel passionate about solving the climate crisis.

The presidency is more than a popularity contest.

When we respond to threats immediately and take action right away, it's usually the threats that we're hard-wired to respond to, the kinds of things that our ancestors survived.

Consider a clock thermostat, and set it so that you're not using energy when you don't need it, when you're out of your house.

...the debate among the scientists if over. There is no more debate. We face a planetary emergency. There is no more scientific debate among serious people who've looked at the science...Well, I guess in some quarters, there's still a debate over whether the moon landing was staged in a movie lot in Arizona, or whether the Earth is flat instead of round.

I take no pleasure in the fact that the scientific predictions I’ve relayed to popular audiences turn out to be true.